Dear Pavel 2009/3/30 Pavel Afonine <PAfonine@lbl.gov>:Hi Folmer, I think I dealt with something similar a while ago. Unfortunately I don't remember the details but your description of the problem definitely rings the bells.... If I remember, the problem was some miscommunication between Autobuild and phenix.refine in terms of using incorrect data columns from input mtz file.... Using the right data was a solution. I don't know the answer, but I would try the following which shouldn't take more than 5 minutes or even less. Run phenix.refine to just compute the maps: phenix.refine model.pdb data.hkl strategy=none main.number_of_macro_cycles=1 where data.hkl is your original file with Fobs.This gives maps looking like what I would suspect them to. Nice. Thank you for the advice. Best regards, Folmer Fredslund